spTimer (version 3.0-0)

spT.check.locations: Distance Monitoring Function

Description

This function is used to check the minimum distance between two locations.

Usage

spT.check.locations(fit.locations, pred.locations, 
   method="geodetic:km", tol = 5) 
spT.check.sites.inside(coords, method, tol=0.1)

Arguments

fit.locations

The locations for the fitted observations.

pred.locations

The locations for the predicted observations.

method

The distance measurement. The available methods are "geodetic:km", "geodetic:mile", "euclidean", "maximum", "manhattan", "canberra", "binary" or "minkowski".

tol

The tolerance limit for the distance.

coords

The longitude and latitude positions in a matrix format.

Details

spT.check.locations is used to check minimum distance between two locations, e.g., fitted and prediction. spT.check.sites.inside is used to check distance within the location points. Here, the tol. limit is 0.01. If output shows nothing then we can say distances are alright. These functions are used to avoid of occuring non-positive definite correlation matrix.

See Also

spT.geodist, dist, spT.subset.

Examples

# NOT RUN {
##

data(NYdata)	
head(NYdata)
NYsite<-unique(NYdata[,1:3])	

# Sample 4 sites randomly from the data NYdata.

r4<-spT.data.selection(data=NYsite, random=TRUE, num.rs=4)

# Choose purposively sites numbered as 2, 8, and 12, 15.

p4<-spT.subset(data=NYsite, s=c(2,8,12,15))
   
# Check locations of datasets r4 and p4

spT.check.locations(fit.locations=r4, pred.locations=p4,
    method="geodetic:km", tol=5)

#
spT.check.sites.inside(NYsite[,2:3],method="geodetic:km")

# if nothing appears then distances are alright

##   
# }